feat(libcxx): add ostream

Signed-off-by: Zone.N <[email protected]>

src/kernel/libcxx/CMakeLists.txt

@@ -15,6 +15,7 @@ enable_language(CXX)
 # 生成对象库
 add_library(${PROJECT_NAME} OBJECT
         ${PROJECT_SOURCE_DIR}/libcxx.cpp
+        ${PROJECT_SOURCE_DIR}/iostream.cpp
 )
 
 # 添加定义
@@ -35,3 +36,8 @@ target_compile_options(${PROJECT_NAME} PRIVATE
 target_link_options(${PROJECT_NAME} PRIVATE
         ${DEFAULT_KERNEL_LINK_OPTIONS}
 )
+
+# 添加要链接的库
+target_link_libraries(${PROJECT_NAME} PRIVATE
+        ${DEFAULT_KERNEL_LINK_LIB}
+)

src/kernel/libcxx/include/iostream

@@ -0,0 +1,55 @@
+
+/**
+ * @file iostream
+ * @brief C++ 输入输出
+ * @author Zone.N ([email protected])
+ * @version 1.0
+ * @date 2021-09-18
+ * @copyright MIT LICENSE
+ * https://github.com/Simple-XX/SimpleKernel
+ * Based on https://github.com/MRNIU/MiniCRT
+ * @par change log:
+ * <table>
+ * <tr><th>Date<th>Author<th>Description
+ * <tr><td>2021-09-18<td>digmouse233<td>迁移到 doxygen
+ * </table>
+ */
+
+#ifndef SIMPLEKERNEL_SRC_KERNEL_LIBCXX_INCLUDE_IOSTREAM_
+#define SIMPLEKERNEL_SRC_KERNEL_LIBCXX_INCLUDE_IOSTREAM_
+
+#include <cstdint>
+
+namespace std {
+class ostream {
+ public:
+  enum openmode : uint8_t {
+    in = 1,
+    out = 2,
+    binary = 4,
+    trunc = 8,
+  };
+
+  /// @name 构造/析构函数
+  /// @{
+  ostream() = default;
+  ostream(const ostream&) = default;
+  ostream(ostream&&) = default;
+  auto operator=(const ostream&) -> ostream& = default;
+  auto operator=(ostream&&) -> ostream& = default;
+  ~ostream() = default;
+  /// @}
+
+  ostream& operator<<(char c);
+  ostream& operator<<(int n);
+  ostream& operator<<(const char* lhs);
+  ostream& operator<<(ostream& (*)(ostream&));
+};
+
+inline ostream& endl(ostream& lhs) { return lhs << '\n'; }
+
+static ostream cout [[maybe_unused]];
+
+};  // namespace std
+
+#endif /* SIMPLEKERNEL_SRC_KERNEL_LIBCXX_INCLUDE_IOSTREAM_ */

src/kernel/libcxx/iostream.cpp

@@ -0,0 +1,43 @@
+
+/**
+ * @file iostream
+ * @brief C++ 输入输出
+ * @author Zone.N ([email protected])
+ * @version 1.0
+ * @date 2021-09-18
+ * @copyright MIT LICENSE
+ * https://github.com/Simple-XX/SimpleKernel
+ * Based on https://github.com/MRNIU/MiniCRT
+ * @par change log:
+ * <table>
+ * <tr><th>Date<th>Author<th>Description
+ * <tr><td>2021-09-18<td>digmouse233<td>迁移到 doxygen
+ * </table>
+ */
+
+#include "iostream"
+
+#include "cstdio"
+
+namespace std {
+
+ostream& ostream::operator<<(char c) {
+  printf("%c", c);
+  return *this;
+}
+
+ostream& ostream::operator<<(int n) {
+  printf("%d", n);
+  return *this;
+}
+
+ostream& ostream::operator<<(const char* lhs) {
+  printf("%s", lhs);
+  return *this;
+}
+
+ostream& ostream::operator<<(ostream& (*manip)(ostream&)) {
+  return manip(*this);
+}
+
+};  // namespace std

src/kernel/main.cpp

@@ -15,6 +15,7 @@
 
 #include "arch.h"
 #include "cstdio"
+#include "iostream"
 #include "kernel.h"
 #include "libcxx.h"
 
@@ -27,6 +28,9 @@ uint32_t main(uint32_t argc, uint8_t* argv) {
   // 架构相关初始化
   [[maybe_unused]] auto arch_init_ret = ArchInit(argc, argv);
 
+  printf("Hello printf\n");
+  std::cout << "Hello ostream" << std::endl;
+
   // 进入死循环
   while (1) {
     ;